If the video is yours, open the snap in Memories , tap the three dots (or hold the snap), and select Export Snap > Download to save it as an MP4 to your camera roll.

There are various online tools where you can paste the URL of a public Snapchat Story or Spotlight video.

Paste the URL into a reputable "Snapchat Video Downloader" website. Select the format and download.

Avoid clicking on suspicious links that promise "leaked" or "private" MP4 files, as these are frequently used to spread malware.

Downloading a specific Snapchat video using a numerical ID like "396498600" typically refers to a or Public Story video. To download a Snapchat video in MP4 format, you generally need to use a third-party downloader or the built-in "Export" feature if the content is your own. How to Download Public Snapchat Videos

Copy the link to the video within the Snapchat app (Share > Copy Link).